# Top 10 common mistakes when writing your own will
Disclaimer: This article is for informational purposes only and does not constitute legal advice. Estate planning laws vary by state. Consult a licensed estate planning attorney in your jurisdiction before drafting or executing any legal documents.
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The most common mistakes when writing your own will include improper signing and witnessing, failing to account for all assets, using ambiguous language, and neglecting to update the document after major life events. These errors can render a will partially or entirely invalid, leaving your estate subject to state intestacy laws — meaning a court, not you, decides who gets what. Here is how to avoid each one.
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A self-drafted will is not inherently a bad idea. According to a 2023 Caring.com survey of 2,500 American adults, only 34% of U.S. adults have any estate planning documents at all — meaning a DIY will is vastly better than no will. The problems arise when people treat the process as a simple form-filling exercise rather than a legally binding document that must satisfy precise statutory requirements.
Here are the ten most consequential errors, ranked by how often they invalidate or complicate the execution of an estate.
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This is the single most common reason a will is thrown out by a probate court. Every U.S. state has formal execution requirements, and they are not optional. In most states, the testator (that is you, the person making the will) must:
Roughly 25 states also recognize holographic wills — entirely handwritten and signed documents — but the requirements vary. California allows holographic wills without witnesses; New York does not recognize them for most adults. Confusing one state's rules with another's is an easy and catastrophic mistake.
The fix: Look up your specific state's execution statute before you sign anything. The American Bar Association's public resources and your state's official legislative website publish these requirements for free.
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Even if your will is otherwise perfectly executed, naming a beneficiary as one of your two required witnesses creates a legal problem in most states. Under "interested witness" statutes, the witness-beneficiary may lose their inheritance, or the gift to them may be voided entirely, even if the rest of the will stands. In some states, the entire will can be challenged.
A common scenario: a parent asks an adult child — who is also a primary heir — to witness the will for convenience. That single decision can cost that child their entire inheritance.
The fix: Use two witnesses who receive nothing under the will. Neighbors, coworkers, or friends with no financial stake in your estate are ideal.
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Your will only controls assets that are part of your probate estate. A large and often-overlooked category of assets passes directly to named beneficiaries regardless of what your will says. These include:
| Asset Type | Controlled by Will? | Controlled by |
|---|---|---|
| Life insurance proceeds | No | Beneficiary designation |
| 401(k) and IRA accounts | No | Beneficiary designation |
| Joint tenancy property | No | Right of survivorship |
| Payable-on-death bank accounts | No | POD designation |
| Revocable living trust assets | No | Trust document |
| Solely owned real estate | Yes | Will / probate |
| Personal property (jewelry, art) | Yes | Will / probate |
| Business interests (varies) | Often yes | Will / operating agreement |
According to LIMRA's 2023 Insurance Barometer Study, Americans hold over $20 trillion in life insurance face value — the vast majority of which will pass via beneficiary designation, not a will. If your beneficiary designations are outdated (naming an ex-spouse, a deceased parent, or no one at all), a carefully written will cannot fix that.
The fix: Audit every account and policy you own. Update beneficiary designations at the same time you draft or revise your will. Treat them as one unified exercise, not two separate tasks.
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Probate litigation frequently begins with a sentence like "I leave my jewelry to my daughters equally." Which jewelry? All of it? The antique brooch you promised verbally to your oldest? "Equally" in cash value, or divided by piece count?
Ambiguity invites disputes. A 2022 study by the American College of Trust and Estate Counsel found that contested estate proceedings cost families an average of $50,000 to $250,000 in legal fees, depending on estate size and complexity — costs drawn directly from the assets you intended to leave behind.
The fix: Be exhaustively specific. Describe items by make, model, location, and approximate value where possible. For sentimental items, attach a separate personal property memorandum (legally recognized in many states) that lists specific items and their intended recipients.
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For parents of children under 18, this is arguably the most consequential omission possible. If both parents die without a named guardian in a valid will, a family court judge — who does not know your children, your values, or your family dynamics — will make that decision. Relatives may compete for custody, creating conflict and legal expense during an already devastating time.
According to the U.S. Census Bureau, approximately 18.2 million children in the United States live in single-parent households, making guardian designation especially critical for single parents who may be the child's sole surviving parent.
The fix: Name both a primary guardian and a backup guardian in your will. Have a separate, honest conversation with your chosen guardian before naming them — do not surprise someone with this responsibility after you are gone. Also consider whether the guardian should be the same person managing financial assets, or whether a separate trustee makes more sense.
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A will is not a set-it-and-forget-it document. It is a snapshot of your wishes at the moment of signing, and life changes faster than most people revisit their estate plans. Triggering events that require a will review include:
A particularly dangerous scenario: a will drafted before a marriage. In many states, a new spouse has statutory rights to a portion of your estate regardless of what an old will says — but the conflict between those rights and your documented wishes can trigger costly legal proceedings.
The fix: Review your will every three to five years as a baseline, and immediately after any major life event. Set a recurring calendar reminder.
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If you have already established a revocable living trust, attempting to also transfer those trust assets via your will creates confusion and potential conflict. Assets properly titled in a trust bypass probate entirely — your will has no authority over them. A will that attempts to re-direct trust assets does not override the trust document; it simply creates legal ambiguity.
The fix: Keep your trust document, your will (often called a "pour-over will" when used alongside a trust), and your beneficiary designations aligned and reviewed by the same attorney.
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Your executor is the person responsible for locating the will, filing it with probate court, notifying creditors, paying debts, and distributing assets. If your named executor has died, become incapacitated, or simply declines to serve, and you have not named an alternate, the probate court will appoint an administrator — someone who may not share your values or know your family.
The fix: Name a primary executor and at least one successor executor. If your estate is complex, consider naming a corporate executor (a bank trust department or professional fiduciary) as either primary or backup.
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Once a formally executed will is signed and witnessed, you cannot modify it by simply crossing something out, writing in a new name, or adding a paragraph in the margins. Such changes are legally void in most states and, worse, can raise questions about the validity of the original document.
The legally correct way to amend a will is through a codicil — a separate document that meets the same execution requirements as the original will — or by revoking the old will entirely and executing a new one.
The fix: Resist the urge to make handwritten edits. Draft a codicil or a new will. This is one area where the cost of a short attorney consultation ($150–$300 in most markets) is unambiguously worth it.
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A will that exists but cannot be located at the time of death is, for practical purposes, no will at all. Probate courts require the original document in most states — a photocopy is not sufficient. Safe deposit boxes present their own problem: in many states, a bank will not allow access to a safe deposit box after death without a court order, which takes time and money.
The fix: Store the original will somewhere accessible — a fireproof home safe, with your attorney, or registered with your state's will registry if available. Tell your executor exactly where it is. Consider giving a copy to your attorney and keeping a note in your personal records about the original's location.
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DIY will platforms like LegalZoom, Trust & Will, and Willing have made basic estate planning accessible for under $200 in most cases. For straightforward situations — a single person with modest assets, no minor children, and a simple beneficiary structure — these tools can be adequate if used carefully and reviewed against your state's requirements.
However, a 2021 Consumer Reports analysis found that online will tools frequently produce documents that fail to meet specific state witnessing, notarization, or execution requirements, and they cannot flag complex issues like blended family dynamics, estate tax exposure, or asset protection concerns.
The general guidance from the National Academy of Elder Law Attorneys: if your estate is worth more than $500,000, you have minor children, you own a business, you have been divorced, or you have assets in multiple states, hire an attorney. Estate planning attorneys typically charge $500–$2,500 for a comprehensive will and basic estate plan, depending on complexity and location. That fee, relative to the assets being protected, is almost always the right economic decision.
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AI-assisted legal tools are accelerating DIY estate planning — and that is both an opportunity and a risk. Platforms like Trust & Will and newer AI-integrated services can now generate state-specific language, flag common omissions, and walk users through scenario-based questionnaires that surface assets or family dynamics they might otherwise overlook.
ChatGPT and similar tools are being used by thousands of people to draft will language, review documents for clarity, and research state-specific execution requirements. For simple, informational purposes, this is genuinely useful. The risk is mistaking AI-generated guidance for legal advice. AI does not know that your state recently changed its witnessing statute, cannot verify that your asset inventory is complete, and cannot represent you if your will is challenged in probate court.
The best use of AI in this context: use it to educate yourself, organize your thinking, and prepare better questions for a licensed attorney. Do not use it as a replacement for one.
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In approximately 25 states, a holographic will — one that is entirely handwritten and signed by the testator — is legally valid without witnesses. States that recognize holographic wills include California, Texas, and Virginia. States that do not include New York, Florida, and Georgia. Always verify your specific state's statute before relying on a handwritten will.
Dying without a valid will is called dying intestate. Your state's intestacy laws then determine who inherits your assets, which may not reflect your wishes at all. In most states, assets pass to a surviving spouse and children first, then to other relatives. Unmarried partners, close friends, and stepchildren who were not legally adopted typically receive nothing under intestacy laws.
Review your will every three to five years at minimum, and immediately after any major life event: marriage, divorce, birth of a child, death of a beneficiary or executor, significant change in assets, or relocation to a new state. Estate planning attorneys often recommend scheduling a review alongside your annual financial planning review.
You can disinherit adult children in most U.S. states, provided the intent is clear in the document. Disinheriting a spouse is more complicated — most states grant surviving spouses an elective share (typically one-third of the estate) that cannot be waived by a will alone. Disinheriting a minor child is generally not possible, as courts may impose support obligations.
No. A will must be filed with and validated by a probate court before assets can be distributed — that is the entire purpose of the probate process. Assets held in a revocable living trust, or that pass via beneficiary designation or joint tenancy, bypass probate entirely. If avoiding probate is a priority, speak with an estate planning attorney about a living trust.
Most states will recognize a will that was validly executed under the laws of another state. However, because execution requirements differ, a will that was valid in your old state may not meet your new state's requirements. Moving is a strong reason to have your existing will reviewed by a licensed attorney in your new state of residence.
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One action you can take today: Pull up your most recent will (or acknowledge that you do not have one) and cross-reference it against the execution requirements published on your state legislature's official website. If you have a will, confirm it is signed, witnessed by two non-beneficiaries, and stored somewhere your executor can find it. If you do not have one, schedule a free 30-minute consultation with an estate planning attorney in your area — the National Academy of Elder Law Attorneys (NAELA.org) maintains a searchable directory.
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This article was produced with AI-assisted research and editorial tools. All legal references and statistical claims have been reviewed for accuracy, but this content does not constitute legal advice. Consult a licensed estate planning attorney for guidance specific to your situation.